\begin{tikzpicture}
    \tkzDefPoints{0/0/B, 3/0/C, 2/2/A}
    \tkzDefPointOnLine[pos=0.6](A,B)  \tkzGetPoint{D}
    \tkzDefPointOnLine[pos=0.6](A,C)  \tkzGetPoint{E}
    \tkzDefPointOnLine[pos=0.93](A,C)  \tkzGetPoint{C'}

    \tkzDrawPolygon(A,B,C)
    \tkzDrawSegment(D,E)
    \tkzDrawSegment[dashed](B,C')
    \tkzLabelPoints[above](A)
    \tkzLabelPoints[left](B,D)
    \tkzLabelPoints[right](E)
    \tkzLabelPoints[right,yshift=0.3em](C')
    \tkzLabelPoints[right,yshift=-0.3em](C)
\end{tikzpicture}

